package com.binguo.wxapi.service;

import com.alibaba.fastjson.JSONObject;
import com.binguo.helper.UploadIMGHelper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import javax.imageio.ImageIO;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.URL;
import java.util.Iterator;
import java.util.UUID;

/**
 * @author yuritian
 * @Title: PictureService
 * @ProjectName binguo
 * @Description: TODO
 * @date 2019-05-1711:07
 */
@Service
public class PictureService {
    @Autowired
    UploadIMGHelper uploadIMGHelper;

    public String getImgURL(String fileUrl){

        //String fileUrl = "http://img.binguoai.com/e8962346-e3d8-016f-90f2-b784c3ba7650.png";
        String filePath = null;
        String uploadResultURL = null;
        OutputStream out = null;
        try {
            filePath = "/Users/yuritian/Documents/PersonalWork/binguo/wxapi/src/main/resources/img/";
            String uuid = UUID.randomUUID().toString();
            File file = new File(filePath+uuid+".png");
            URL url = new URL(fileUrl);
            DataInputStream dataInputStream = new DataInputStream(url.openStream());

            FileOutputStream fileOutputStream = new FileOutputStream(file);
            ByteArrayOutputStream output = new ByteArrayOutputStream();

            byte[] buffer = new byte[1024];
            int length;

            while ((length = dataInputStream.read(buffer)) > 0) {
                output.write(buffer, 0, length);
            }
            byte[] context=output.toByteArray();
            fileOutputStream.write(output.toByteArray());
            dataInputStream.close();
            fileOutputStream.close();

            JSONObject uploadResult = JSONObject.parseObject(uploadIMGHelper.upload(file,uuid+".png"));
            uploadResultURL = uploadResult.getString("key");
            System.out.println(uploadResultURL);
        } catch (Exception e) {
            System.out.println("下载失败");
            System.out.println(e + fileUrl + filePath);

        }


        return uploadResultURL;
    }




    public String uploadImg(String imgBase64String){
        String filePath = "/Users/yuritian/Documents/YunpengWork/binguoDevelop/wxapi/src/main/resources/img/";
        String fileName = UUID.randomUUID().toString() + ".png";
        generateImage(imgBase64String, filePath+fileName);
        return filePath+fileName;
    }

    private boolean generateImage(String imgStr, String path) {
        if(imgStr == null){
            return false;
        }
        BASE64Decoder decoder = new BASE64Decoder();
        try{
            //解密
            byte[] b = decoder.decodeBuffer(imgStr);
            //处理数据
            for (int i = 0;i<b.length;++i){
                if(b[i]<0){
                    b[i]+=256;
                }
            }
            OutputStream out = new FileOutputStream(path);
            out.write(b);
            out.flush();
            out.close();
            return true;
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }
    }

    private String getImageStr(String imgFile) {
        InputStream inputStream = null;
        byte[] data = null;
        try {
            inputStream = new FileInputStream(imgFile);
            data = new byte[inputStream.available()];
            inputStream.read(data);
            inputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        // 加密
        BASE64Encoder encoder = new BASE64Encoder();
        return encoder.encode(data);
    }

    public static void cut(String srcpath, String subpath)throws IOException {

        FileInputStream is =  null ;
        ImageInputStream iis = null ;

        try {
            // 读取图片文件
            is =new FileInputStream(srcpath);

            /*
             * 返回包含所有当前已注册 ImageReader 的 Iterator，这些 ImageReader
             * 声称能够解码指定格式。 参数：formatName - 包含非正式格式名称 .
             *（例如 "jpeg" 或 "tiff"）等 。
             */
            Iterator<ImageReader> it= ImageIO.getImageReadersByFormatName("png");
            ImageReader reader = it.next();
            // 获取图片流
            iis = ImageIO.createImageInputStream(is);

            /*
             * <p>iis:读取源.true:只向前搜索 </p>.将它标记为 ‘只向前搜索'。
             * 此设置意味着包含在输入源中的图像将只按顺序读取，可能允许 reader
             * 避免缓存包含与以前已经读取的图像关联的数据的那些输入部分。
             */
            reader.setInput(iis, true ) ;

            /*
             * <p>描述如何对流进行解码的类<p>.用于指定如何在输入时从 Java Image I/O
             * 框架的上下文中的流转换一幅图像或一组图像。用于特定图像格式的插件
             * 将从其 ImageReader 实现的 getDefaultReadParam 方法中返回
             * ImageReadParam 的实例。
             */
            ImageReadParam param = reader.getDefaultReadParam();

            /*
             * 图片裁剪区域。Rectangle 指定了坐标空间中的一个区域，通过 Rectangle 对象
             * 的左上顶点的坐标（x，y）、宽度和高度可以定义这个区域。
             */
            Rectangle rect =  new Rectangle(466, 223, 546, 546);


            // 提供一个 BufferedImage，将其用作解码像素数据的目标。
            param.setSourceRegion(rect);

            /*
             * 使用所提供的 ImageReadParam 读取通过索引 imageIndex 指定的对象，并将
             * 它作为一个完整的 BufferedImage 返回。
             */
            BufferedImage bi=reader.read(0,param);

            // 保存新图片
            ImageIO.write(bi,"jpg",new File(subpath));
        } finally {
            if (is != null )
                is.close() ;
            if (iis != null )
                iis.close();
        }



    }


    public static void main(String[] args) {
        try {
            String uuid = UUID.randomUUID().toString();
            cut("/Users/yuritian/Documents/YunpengWork/binguoDevelop/wxapi/src/main/resources/img/test.png","/Users/yuritian/Documents/YunpengWork/binguoDevelop/wxapi/src/main/resources/img/"+uuid+".png");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}
